The Effect of a Conductive Surface Layer on TEM Central‐Loop Soundings in Groundwater Exploration

2001 ◽  
Author(s):  
Stewart K. Sandberg
Keyword(s):  
Surface Layer ◽  
Groundwater Exploration ◽  
Conductive Surface ◽  
Central Loop

scholarly journals Origin of conductive surface layer in annealed ZnO

2008 ◽  
Vol 92 (12) ◽  
pp. 122108 ◽  
Author(s):  
D. C. Look ◽  
B. Claflin ◽  
H. E. Smith
Keyword(s):  
Surface Layer ◽  
Conductive Surface

Creation of a conductive surface layer on polypropylene samples by low‐pressure plasma treatments

1995 ◽  
Vol 77 (11) ◽  
pp. 5695-5701 ◽  
Author(s):  
M. Collaud Coen ◽  
P. Groening ◽  
G. Dietler ◽  
L. Schlapbach
Keyword(s):  
Surface Layer ◽  
Low Pressure ◽  
Pressure Plasma ◽  
Plasma Treatments ◽  
Conductive Surface ◽  
Low Pressure Plasma

scholarly journals Reducing Mg Anode Overpotential via Ion Conductive Surface Layer Formation by Iodine Additive

2017 ◽  
Vol 8 (7) ◽  
pp. 1701728 ◽  
Author(s):  
Xiaogang Li ◽  
Tao Gao ◽  
Fudong Han ◽  
Zhaohui Ma ◽  
Xiulin Fan ◽  
...  
Keyword(s):  
Surface Layer ◽  
Layer Formation ◽  
Conductive Surface ◽  
Surface Layer Formation

scholarly journals EDM of Insulating Ceramics by Electrical Conductive Surface Layer Control

Procedia CIRP ◽  
2016 ◽  
Vol 42 ◽  
pp. 201-205 ◽  
Author(s):  
Hiromitsu Gotoh ◽  
Takayuki Tani ◽  
Naotake Mohri
Keyword(s):  
Surface Layer ◽  
Conductive Surface ◽  
Insulating Ceramics ◽  
Layer Control

scholarly journals Reducing Mg Anode Overpotential via Ion Conductive Surface Layer Formation by Iodine Additive

2018 ◽  
Vol 8 (23) ◽  
pp. 1802041 ◽  
Author(s):  
Xiaogang Li ◽  
Tao Gao ◽  
Fudong Han ◽  
Zhaohui Ma ◽  
Xiulin Fan ◽  
...  
Keyword(s):  
Surface Layer ◽  
Layer Formation ◽  
Conductive Surface ◽  
Surface Layer Formation

A downhole magnetometric resistivity technique for electrical sounding beneath a conductive surface layer

Geophysics ◽  
1988 ◽  
Vol 53 (4) ◽  
pp. 528-536 ◽  
Author(s):  
R. N. Edwards
Keyword(s):  
Magnetic Field ◽  
Surface Layer ◽  
Magnetic Fields ◽  
Current Source ◽  
Diagnostic Ratios ◽  
Sea Floor ◽  
Earth Resistivity ◽  
Conductive Surface ◽  
Electrical Sounding ◽  
The Magnetic Field

The magnetometric resistivity (MMR) method has not been used systematically for vertical electrical sounding because surficial measurements of the magnetic field caused by static current flow from a point source of current at the surface are independent of the form of the variation of earth resistivity with depth. However, data obtained from an adaptation of the MMR method in which the ratio of the magnetic fields below and above a known conductive surface layer is measured as a function of the horizontal range from the current source can be inverted to obtain the unknown resistivity of deeper material. The practical limitation is that the integrated conductivity of the surface layer must not be much smaller than the integrated conductivity of the unknown zone in order to observe diagnostic ratios significantly different from unity. The expressions derived for the magnetic‐field ratio and for the sensitivity of the ratio to changes in the resistivity of a plane‐layered unknown zone are closed‐form inverse Hankel transforms. The transforms are evaluated analytically for a model of constant, uniform resistivity. One possible geotechnical application of the method is the detection of offshore, resistive permafrost beneath the shallow Beaufort Sea. A theoretical design study in which ratios of the magnetic fields at the bottom and top of the sea are synthesized and the sensitivity of those ratios to changes in sea‐floor resistivity is determined as a function of range and depth, respectively, reveals that the resistivity of a permafrost zone 50 m thick buried 20 m below the sea floor can be identified. The maximum range needed is of the order of 200 m, which appears to be smaller than the maximum spacing required for a Schlumberger sounding to yield similar information.

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